Buying your way towards a conversion

1. Cheaper initial investment.. $599 Buy an adapter and build your own kit by finding your own engine in a junkyard and figuring out how to make it work. Here's where to find an engine: They come stock in 2.5 liter displacement (151 cu in) and were used in Sunbirds, Monzas from 1977 - 1983 and Jeep CJ5 & CJ7 1980 - 1983 (must be the GM 151 4 cylinder Jeep engine and not the AMC 150). Please note: this option takes longer and could cost more in the long run.

Complete kits (about 6 hours to install)

1. For Series vehicles originally with 4 cylinder engines: Mid-range price - $2,950. The 2.5 liter (151 cu in) remanufactured crossflow engine kit. You supply the clutch and exhaust. There is no need to change original gearing and will allow your series to travel at highway speeds @70 mph and above.

Crated Robert Davis GM Engine

2. For Series vehicles originally with 4 cylinder engine: Most expensive $4,200 Complete remanufactured 3.0 liter (183 cu in) engine kit based on the 151, but a stroked out remanufactured crossflow version. They take about 6 hours to install. Comes with everything including wiring. You add a 9.5 inch clutch and custom exhaust and drive away. Will easily pull high range diffs or the Ashcroft transfer box. This high performance engine is excellent on and off road and will never run out of power.

3. For Series vehicles originally with 6 cylinder engine: The $4,200 Complete remanufactured 3.0 liter (181 cu in) non-crossflow engine kit based on the 181 GM Marine power plant. They take about 6 hours to install. Comes with everything including wiring. You add a 9.5 inch clutch and custom exhaust and drive away. Will easily pull high range diffs or the Ashcroft transfer box. This high performance engine is excellent on and off road and will never run out of power.

Do it yourself

1. Do-it-yourself $1,299 Comes with used rebuildable GM 151 crossflow core engine and adapter ONLY. Same as #1, but with core engine.

2. Do-it-yourself $1,999 (almost a kit) Comes with used rebuildable GM 151 crossflow core engine, adapter, adapter mud shield, metal motor mounts, rubber motor mounts, intake manifold, intake plenum, accelerator linkage bracket, alternator mount, alternator adjustment bracket, and instruction sheet.

3. Do-it-yourself $1,299 (almost a kit, but you supply the engine) Comes with adapter, adapter mud shield, metal motor mounts, rubber motor mounts, intake manifold, intake plenum, accelerator linkage bracket, alternator mount, alternator adjustment bracket, and instruction sheet.

Non-crossflow and crossflow motors

4. Do-it-yourself 3.0 liter (183 cu in) $2,499 (almost a kit) Comes with used rebuildable GM 151 crossflow core engine, adapter, adapter mud shield, 3.0 liter crank seal mount, flywheel, pilot bushing, pilot bushing keeper tabs, metal motor mounts, rubber motor mounts, intake manifold, intake plenum, accelerator linkage bracket, alternator mount, alternator adjustment bracket, and instruction sheet.

5. Do-it-yourself 3.0 liter (183 cu in) $1,599 (almost a kit, but you supply the engine) Comes with adapter, adapter mud shield, 3.0 liter crank seal mount, flywheel, pilot bushing, pilot bushing keeper tabs, metal motor mounts, rubber motor mounts, intake manifold, intake plenum, accelerator linkage bracket, alternator mount, alternator adjustment bracket, and instruction sheet.